Chalk line marking apparatus



FIG. 1 is a front perspective view of the chalk line marking apparatus.

FIG. 2 is a back perspective view of the chalk line marking apparatus.

FIG. 3 is a left side view of the chalk line marking apparatus.

FIG. 4 is a right side view of the chalk line marking apparatus.

FIG. 5 is a back view of the chalk line marking apparatus.

FIG. 6 is a front view of the chalk line marking apparatus.

FIG. 7 is a top view of the chalk line marking apparatus; and,

FIG. 8 is a bottom view of the chalk line marking apparatus.

The broken lines represent portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a chalk line marking apparatus, as shown and described. 